Explain the issue you are having:
Whenever I try to adjust the length of the slider, it disappears.
(1st set of Screenshots)
Also when I try to clone/copypaste a slider, it goes straight to heaven.
(2nd set of Screenshots)
I'm not sure if it's me, or osu! lol.
I also don't know if someone already reported this. Well I did this just to make sure.
1. Adjust slider length, slider disappears
2. Clone a slider, it doesn't look like a clone.
Whenever I try to adjust the length of the slider, it disappears.

Also when I try to clone/copypaste a slider, it goes straight to heaven.

I'm not sure if it's me, or osu! lol.
I also don't know if someone already reported this. Well I did this just to make sure.

1. Adjust slider length, slider disappears
2. Clone a slider, it doesn't look like a clone.
1st set of Screenshots
From:

Into:

Into:
2nd set of Screenshots
Copying:

Paste:

Paste: